Abstract
Microstructure transformation is examined for W - Ni - Sn composites made by liquid-phase sintering at 1200 °C for 1 h; the liquid phase was a eutectic containing 67.5 mass% Ni and 32.5 mass% Sn. There is a nonmonotone dependence of the tungsten grain size in the sintered composites on the volume proportion of liquid phase in the range 6.7–36.8%. The mean grain size in relation to volume proportion of liquid phase in liquid-phase sintering is calculated from rheological sintering theory. The form of the empirical function f(v) is quantitatively demonstrated, which determines the rate of tungsten grain growth on liquid-phase sintering and is dependent on the proportion of matrix in the composite and the size of the liquid phase layer.
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REFERENCES
V. I. Nizhenko, V. Ya. Petrishchev, and V. V. Skorokhod, “Compaction kinetics in liquid-phase sintering of W-Ni-Sn pseudoalloys,” Poroshk. Metall., Nos. 7–8, 46–53 (2004).
V. V. Skorokhod, Yu. M. Solonin, and I. V. Uvarova, Chemical, Diffusional, and Rheological Processes in Powder-Material Technology [in Russian], Nauk. Dumka, Kiev (1990).
R. M. German, “Microstructure of the gravitationally settled region in a liquid phase sintered dilute tungsten heavy alloy,” Metall. Mater. Trans., 26A, 279–288 (1995).
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Translated from Poroshkovaya Metallurgiya, Nos. 7–8(444), pp. 53–57, July–August, 2005.
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Get'man, O.I., Nizhenko, V.I., Petrishchev, V.Y. et al. Microstructure of W - Ni - Sn Composites in Relation to Amount of Liquid Phase on Sintering. Powder Metall Met Ceram 44, 347–352 (2005). https://doi.org/10.1007/s11106-005-0101-7
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DOI: https://doi.org/10.1007/s11106-005-0101-7